Q1 of 9 Page 252

15 households in a neighbourhood are sorted a according to their monthly income in the table below.


Calculate the median income.

There are total 35 households.

the median monthly income of these houses will be Monthly Income of which is 18th term.



we can see that the 18th value is Rs. 6000 which is the also the monthly income and 8 other households and the other 10 have low income than Rs.6000.


∴ median = Rs.6000


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2

The table below gives the rainfall during one week of September 2015 in various districts of Kerala.


Calculate the mean and median rainfall in Kerala during this week. Why is the median less than mean?

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Prove that for a set of n numbers in arithmetic sequence, the mean and median are equal.

 2

The table below shows the workers in a factory sorted according to their daily wages:


Calculate the median daily wage

 3

The table below gives the number of babies born in a hospital during a week, sorted according to their birth weight.


Calculate the median birth-weight.